I dont think that it smart because you also dont even know what will happen in the future with the value of Bitcoin so that is really bad and risky.
But you can do many things indeed with Bitcoin but it is better to see Bitcoin as a bonus or something.
i think full time is good choice, some people get salary only $300 and if he focus at bitcoin he can earn 1btc/month , so it's better to go full time on bitcoin.
withdraw $300 as "real salary" then save some for investment
Can you constantly earn 1 btc monthly? If so, then you can go and quit you job. But if you can't, you don't have to quit. You can do both and save yourself from financial troubles in the future. Having two source of income is better than just one.